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Emergent Majorana Mass and Axion Couplings in Superfluids (1401.4379v2)
Published 17 Jan 2014 in hep-ph, cond-mat.supr-con, and hep-th
Abstract: Axions (in the general sense) may acquire qualitatively new couplings inside superfluids. Their conventional couplings to fermions, in empty space, involve purely imaginary masses; the new couplings involve emergent Majorana masses. The possibility of weak links for axions, recently put forward, is analyzed, rejected, and replaced with a non-local analogue.
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